31489037 has 2 divisors, whose sum is σ = 31489038. Its totient is φ = 31489036.

The previous prime is 31489027. The next prime is 31489043. The reversal of 31489037 is 73098413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25867396 + 5621641 = 5086^2 + 2371^2 .

It is an emirp because it is prime and its reverse (73098413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31489037 - 2¹⁰ = 31488013 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31488988 and 31489006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31489027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15744518 + 15744519.

It is an arithmetic number, because the mean of its divisors is an integer number (15744519).

Almost surely, 2^31489037 is an apocalyptic number.

It is an amenable number.

31489037 is a deficient number, since it is larger than the sum of its proper divisors (1).

31489037 is an equidigital number, since it uses as much as digits as its factorization.

31489037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 31489037 is about 5611.5093335038. The cubic root of 31489037 is about 315.7813374039.

The spelling of 31489037 in words is "thirty-one million, four hundred eighty-nine thousand, thirty-seven".